<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>a and b</title>
</head>

<body>
    <style>
        #a {
            width: 100px;
            height: 100px;
            background: #32C3DE;
        }

        #b {
            width: 100px;
            height: 100px;
            background: #2194ff;
        }
    </style>
    <div id="a">
        aaa
    </div>
    <div id="b">
        bbb
    </div>
    <script src="../utils/a_b.js"></script>
    <script>
        let a_b = new A_B({
            a_id: "a",
            b_id: "b",
        })
    </script>
</body>

<style>
</style>
</html>